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TOMOYO Linux Cross Reference
Linux/fs/ncpfs/ncplib_kernel.c

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  1 /*
  2  *  ncplib_kernel.c
  3  *
  4  *  Copyright (C) 1995, 1996 by Volker Lendecke
  5  *  Modified for big endian by J.F. Chadima and David S. Miller
  6  *  Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
  7  *  Modified 1999 Wolfram Pienkoss for NLS
  8  *  Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info
  9  *
 10  */
 11 
 12 
 13 
 14 #include "ncp_fs.h"
 15 
 16 static inline void assert_server_locked(struct ncp_server *server)
 17 {
 18         if (server->lock == 0) {
 19                 DPRINTK("ncpfs: server not locked!\n");
 20         }
 21 }
 22 
 23 static void ncp_add_byte(struct ncp_server *server, __u8 x)
 24 {
 25         assert_server_locked(server);
 26         *(__u8 *) (&(server->packet[server->current_size])) = x;
 27         server->current_size += 1;
 28         return;
 29 }
 30 
 31 static void ncp_add_word(struct ncp_server *server, __le16 x)
 32 {
 33         assert_server_locked(server);
 34         put_unaligned(x, (__le16 *) (&(server->packet[server->current_size])));
 35         server->current_size += 2;
 36         return;
 37 }
 38 
 39 static void ncp_add_be16(struct ncp_server *server, __u16 x)
 40 {
 41         assert_server_locked(server);
 42         put_unaligned(cpu_to_be16(x), (__be16 *) (&(server->packet[server->current_size])));
 43         server->current_size += 2;
 44 }
 45 
 46 static void ncp_add_dword(struct ncp_server *server, __le32 x)
 47 {
 48         assert_server_locked(server);
 49         put_unaligned(x, (__le32 *) (&(server->packet[server->current_size])));
 50         server->current_size += 4;
 51         return;
 52 }
 53 
 54 static void ncp_add_be32(struct ncp_server *server, __u32 x)
 55 {
 56         assert_server_locked(server);
 57         put_unaligned(cpu_to_be32(x), (__be32 *)(&(server->packet[server->current_size])));
 58         server->current_size += 4;
 59 }
 60 
 61 static inline void ncp_add_dword_lh(struct ncp_server *server, __u32 x) {
 62         ncp_add_dword(server, cpu_to_le32(x));
 63 }
 64 
 65 static void ncp_add_mem(struct ncp_server *server, const void *source, int size)
 66 {
 67         assert_server_locked(server);
 68         memcpy(&(server->packet[server->current_size]), source, size);
 69         server->current_size += size;
 70         return;
 71 }
 72 
 73 static void ncp_add_pstring(struct ncp_server *server, const char *s)
 74 {
 75         int len = strlen(s);
 76         assert_server_locked(server);
 77         if (len > 255) {
 78                 DPRINTK("ncpfs: string too long: %s\n", s);
 79                 len = 255;
 80         }
 81         ncp_add_byte(server, len);
 82         ncp_add_mem(server, s, len);
 83         return;
 84 }
 85 
 86 static inline void ncp_init_request(struct ncp_server *server)
 87 {
 88         ncp_lock_server(server);
 89 
 90         server->current_size = sizeof(struct ncp_request_header);
 91         server->has_subfunction = 0;
 92 }
 93 
 94 static inline void ncp_init_request_s(struct ncp_server *server, int subfunction)
 95 {
 96         ncp_lock_server(server);
 97         
 98         server->current_size = sizeof(struct ncp_request_header) + 2;
 99         ncp_add_byte(server, subfunction);
100 
101         server->has_subfunction = 1;
102 }
103 
104 static inline char *
105 ncp_reply_data(struct ncp_server *server, int offset)
106 {
107         return &(server->packet[sizeof(struct ncp_reply_header) + offset]);
108 }
109 
110 static inline u8 BVAL(const void *data)
111 {
112         return *(const u8 *)data;
113 }
114 
115 static u8 ncp_reply_byte(struct ncp_server *server, int offset)
116 {
117         return *(const u8 *)ncp_reply_data(server, offset);
118 }
119 
120 static inline u16 WVAL_LH(const void *data)
121 {
122         return get_unaligned_le16(data);
123 }
124 
125 static u16
126 ncp_reply_le16(struct ncp_server *server, int offset)
127 {
128         return get_unaligned_le16(ncp_reply_data(server, offset));
129 }
130 
131 static u16
132 ncp_reply_be16(struct ncp_server *server, int offset)
133 {
134         return get_unaligned_be16(ncp_reply_data(server, offset));
135 }
136 
137 static inline u32 DVAL_LH(const void *data)
138 {
139         return get_unaligned_le32(data);
140 }
141 
142 static __le32
143 ncp_reply_dword(struct ncp_server *server, int offset)
144 {
145         return get_unaligned((__le32 *)ncp_reply_data(server, offset));
146 }
147 
148 static inline __u32 ncp_reply_dword_lh(struct ncp_server* server, int offset) {
149         return le32_to_cpu(ncp_reply_dword(server, offset));
150 }
151 
152 int
153 ncp_negotiate_buffersize(struct ncp_server *server, int size, int *target)
154 {
155         int result;
156 
157         ncp_init_request(server);
158         ncp_add_be16(server, size);
159 
160         if ((result = ncp_request(server, 33)) != 0) {
161                 ncp_unlock_server(server);
162                 return result;
163         }
164         *target = min_t(unsigned int, ncp_reply_be16(server, 0), size);
165 
166         ncp_unlock_server(server);
167         return 0;
168 }
169 
170 
171 /* options: 
172  *      bit 0   ipx checksum
173  *      bit 1   packet signing
174  */
175 int
176 ncp_negotiate_size_and_options(struct ncp_server *server, 
177         int size, int options, int *ret_size, int *ret_options) {
178         int result;
179 
180         /* there is minimum */
181         if (size < NCP_BLOCK_SIZE) size = NCP_BLOCK_SIZE;
182 
183         ncp_init_request(server);
184         ncp_add_be16(server, size);
185         ncp_add_byte(server, options);
186         
187         if ((result = ncp_request(server, 0x61)) != 0)
188         {
189                 ncp_unlock_server(server);
190                 return result;
191         }
192 
193         /* NCP over UDP returns 0 (!!!) */
194         result = ncp_reply_be16(server, 0);
195         if (result >= NCP_BLOCK_SIZE)
196                 size = min(result, size);
197         *ret_size = size;
198         *ret_options = ncp_reply_byte(server, 4);
199 
200         ncp_unlock_server(server);
201         return 0;
202 }
203 
204 int ncp_get_volume_info_with_number(struct ncp_server* server,
205                              int n, struct ncp_volume_info* target) {
206         int result;
207         int len;
208 
209         ncp_init_request_s(server, 44);
210         ncp_add_byte(server, n);
211 
212         if ((result = ncp_request(server, 22)) != 0) {
213                 goto out;
214         }
215         target->total_blocks = ncp_reply_dword_lh(server, 0);
216         target->free_blocks = ncp_reply_dword_lh(server, 4);
217         target->purgeable_blocks = ncp_reply_dword_lh(server, 8);
218         target->not_yet_purgeable_blocks = ncp_reply_dword_lh(server, 12);
219         target->total_dir_entries = ncp_reply_dword_lh(server, 16);
220         target->available_dir_entries = ncp_reply_dword_lh(server, 20);
221         target->sectors_per_block = ncp_reply_byte(server, 28);
222 
223         memset(&(target->volume_name), 0, sizeof(target->volume_name));
224 
225         result = -EIO;
226         len = ncp_reply_byte(server, 29);
227         if (len > NCP_VOLNAME_LEN) {
228                 DPRINTK("ncpfs: volume name too long: %d\n", len);
229                 goto out;
230         }
231         memcpy(&(target->volume_name), ncp_reply_data(server, 30), len);
232         result = 0;
233 out:
234         ncp_unlock_server(server);
235         return result;
236 }
237 
238 int ncp_get_directory_info(struct ncp_server* server, __u8 n, 
239                            struct ncp_volume_info* target) {
240         int result;
241         int len;
242 
243         ncp_init_request_s(server, 45);
244         ncp_add_byte(server, n);
245 
246         if ((result = ncp_request(server, 22)) != 0) {
247                 goto out;
248         }
249         target->total_blocks = ncp_reply_dword_lh(server, 0);
250         target->free_blocks = ncp_reply_dword_lh(server, 4);
251         target->purgeable_blocks = 0;
252         target->not_yet_purgeable_blocks = 0;
253         target->total_dir_entries = ncp_reply_dword_lh(server, 8);
254         target->available_dir_entries = ncp_reply_dword_lh(server, 12);
255         target->sectors_per_block = ncp_reply_byte(server, 20);
256 
257         memset(&(target->volume_name), 0, sizeof(target->volume_name));
258 
259         result = -EIO;
260         len = ncp_reply_byte(server, 21);
261         if (len > NCP_VOLNAME_LEN) {
262                 DPRINTK("ncpfs: volume name too long: %d\n", len);
263                 goto out;
264         }
265         memcpy(&(target->volume_name), ncp_reply_data(server, 22), len);
266         result = 0;
267 out:
268         ncp_unlock_server(server);
269         return result;
270 }
271 
272 int
273 ncp_close_file(struct ncp_server *server, const char *file_id)
274 {
275         int result;
276 
277         ncp_init_request(server);
278         ncp_add_byte(server, 0);
279         ncp_add_mem(server, file_id, 6);
280 
281         result = ncp_request(server, 66);
282         ncp_unlock_server(server);
283         return result;
284 }
285 
286 int
287 ncp_make_closed(struct inode *inode)
288 {
289         int err;
290 
291         err = 0;
292         mutex_lock(&NCP_FINFO(inode)->open_mutex);
293         if (atomic_read(&NCP_FINFO(inode)->opened) == 1) {
294                 atomic_set(&NCP_FINFO(inode)->opened, 0);
295                 err = ncp_close_file(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle);
296 
297                 if (!err)
298                         PPRINTK("ncp_make_closed: volnum=%d, dirent=%u, error=%d\n",
299                                 NCP_FINFO(inode)->volNumber,
300                                 NCP_FINFO(inode)->dirEntNum, err);
301         }
302         mutex_unlock(&NCP_FINFO(inode)->open_mutex);
303         return err;
304 }
305 
306 static void ncp_add_handle_path(struct ncp_server *server, __u8 vol_num,
307                                 __le32 dir_base, int have_dir_base, 
308                                 const char *path)
309 {
310         ncp_add_byte(server, vol_num);
311         ncp_add_dword(server, dir_base);
312         if (have_dir_base != 0) {
313                 ncp_add_byte(server, 1);        /* dir_base */
314         } else {
315                 ncp_add_byte(server, 0xff);     /* no handle */
316         }
317         if (path != NULL) {
318                 ncp_add_byte(server, 1);        /* 1 component */
319                 ncp_add_pstring(server, path);
320         } else {
321                 ncp_add_byte(server, 0);
322         }
323 }
324 
325 int ncp_dirhandle_alloc(struct ncp_server* server, __u8 volnum, __le32 dirent,
326                         __u8* dirhandle) {
327         int result;
328 
329         ncp_init_request(server);
330         ncp_add_byte(server, 12);               /* subfunction */
331         ncp_add_byte(server, NW_NS_DOS);
332         ncp_add_byte(server, 0);
333         ncp_add_word(server, 0);
334         ncp_add_handle_path(server, volnum, dirent, 1, NULL);
335         if ((result = ncp_request(server, 87)) == 0) {
336                 *dirhandle = ncp_reply_byte(server, 0);
337         }
338         ncp_unlock_server(server);
339         return result;
340 }
341 
342 int ncp_dirhandle_free(struct ncp_server* server, __u8 dirhandle) {
343         int result;
344         
345         ncp_init_request_s(server, 20);
346         ncp_add_byte(server, dirhandle);
347         result = ncp_request(server, 22);
348         ncp_unlock_server(server);
349         return result;
350 }
351 
352 void ncp_extract_file_info(const void *structure, struct nw_info_struct *target)
353 {
354         const __u8 *name_len;
355         const int info_struct_size = offsetof(struct nw_info_struct, nameLen);
356 
357         memcpy(target, structure, info_struct_size);
358         name_len = structure + info_struct_size;
359         target->nameLen = *name_len;
360         memcpy(target->entryName, name_len + 1, *name_len);
361         target->entryName[*name_len] = '\0';
362         target->volNumber = le32_to_cpu(target->volNumber);
363         return;
364 }
365 
366 #ifdef CONFIG_NCPFS_NFS_NS
367 static inline void ncp_extract_nfs_info(const unsigned char *structure,
368                                  struct nw_nfs_info *target)
369 {
370         target->mode = DVAL_LH(structure);
371         target->rdev = DVAL_LH(structure + 8);
372 }
373 #endif
374 
375 int ncp_obtain_nfs_info(struct ncp_server *server,
376                         struct nw_info_struct *target)
377 
378 {
379         int result = 0;
380 #ifdef CONFIG_NCPFS_NFS_NS
381         __u32 volnum = target->volNumber;
382 
383         if (ncp_is_nfs_extras(server, volnum)) {
384                 ncp_init_request(server);
385                 ncp_add_byte(server, 19);       /* subfunction */
386                 ncp_add_byte(server, server->name_space[volnum]);
387                 ncp_add_byte(server, NW_NS_NFS);
388                 ncp_add_byte(server, 0);
389                 ncp_add_byte(server, volnum);
390                 ncp_add_dword(server, target->dirEntNum);
391                 /* We must retrieve both nlinks and rdev, otherwise some server versions
392                    report zeroes instead of valid data */
393                 ncp_add_dword_lh(server, NSIBM_NFS_MODE | NSIBM_NFS_NLINKS | NSIBM_NFS_RDEV);
394 
395                 if ((result = ncp_request(server, 87)) == 0) {
396                         ncp_extract_nfs_info(ncp_reply_data(server, 0), &target->nfs);
397                         DPRINTK(KERN_DEBUG
398                                 "ncp_obtain_nfs_info: (%s) mode=0%o, rdev=0x%x\n",
399                                 target->entryName, target->nfs.mode,
400                                 target->nfs.rdev);
401                 } else {
402                         target->nfs.mode = 0;
403                         target->nfs.rdev = 0;
404                 }
405                 ncp_unlock_server(server);
406 
407         } else
408 #endif
409         {
410                 target->nfs.mode = 0;
411                 target->nfs.rdev = 0;
412         }
413         return result;
414 }
415 
416 /*
417  * Returns information for a (one-component) name relative to
418  * the specified directory.
419  */
420 int ncp_obtain_info(struct ncp_server *server, struct inode *dir, const char *path,
421                         struct nw_info_struct *target)
422 {
423         __u8  volnum = NCP_FINFO(dir)->volNumber;
424         __le32 dirent = NCP_FINFO(dir)->dirEntNum;
425         int result;
426 
427         if (target == NULL) {
428                 printk(KERN_ERR "ncp_obtain_info: invalid call\n");
429                 return -EINVAL;
430         }
431         ncp_init_request(server);
432         ncp_add_byte(server, 6);        /* subfunction */
433         ncp_add_byte(server, server->name_space[volnum]);
434         ncp_add_byte(server, server->name_space[volnum]); /* N.B. twice ?? */
435         ncp_add_word(server, cpu_to_le16(0x8006));      /* get all */
436         ncp_add_dword(server, RIM_ALL);
437         ncp_add_handle_path(server, volnum, dirent, 1, path);
438 
439         if ((result = ncp_request(server, 87)) != 0)
440                 goto out;
441         ncp_extract_file_info(ncp_reply_data(server, 0), target);
442         ncp_unlock_server(server);
443         
444         result = ncp_obtain_nfs_info(server, target);
445         return result;
446 
447 out:
448         ncp_unlock_server(server);
449         return result;
450 }
451 
452 #ifdef CONFIG_NCPFS_NFS_NS
453 static int
454 ncp_obtain_DOS_dir_base(struct ncp_server *server,
455                 __u8 ns, __u8 volnum, __le32 dirent,
456                 const char *path, /* At most 1 component */
457                 __le32 *DOS_dir_base)
458 {
459         int result;
460 
461         ncp_init_request(server);
462         ncp_add_byte(server, 6); /* subfunction */
463         ncp_add_byte(server, ns);
464         ncp_add_byte(server, ns);
465         ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
466         ncp_add_dword(server, RIM_DIRECTORY);
467         ncp_add_handle_path(server, volnum, dirent, 1, path);
468 
469         if ((result = ncp_request(server, 87)) == 0)
470         {
471                 if (DOS_dir_base) *DOS_dir_base=ncp_reply_dword(server, 0x34);
472         }
473         ncp_unlock_server(server);
474         return result;
475 }
476 #endif /* CONFIG_NCPFS_NFS_NS */
477 
478 static inline int
479 ncp_get_known_namespace(struct ncp_server *server, __u8 volume)
480 {
481 #if defined(CONFIG_NCPFS_OS2_NS) || defined(CONFIG_NCPFS_NFS_NS)
482         int result;
483         __u8 *namespace;
484         __u16 no_namespaces;
485 
486         ncp_init_request(server);
487         ncp_add_byte(server, 24);       /* Subfunction: Get Name Spaces Loaded */
488         ncp_add_word(server, 0);
489         ncp_add_byte(server, volume);
490 
491         if ((result = ncp_request(server, 87)) != 0) {
492                 ncp_unlock_server(server);
493                 return NW_NS_DOS; /* not result ?? */
494         }
495 
496         result = NW_NS_DOS;
497         no_namespaces = ncp_reply_le16(server, 0);
498         namespace = ncp_reply_data(server, 2);
499 
500         while (no_namespaces > 0) {
501                 DPRINTK("get_namespaces: found %d on %d\n", *namespace, volume);
502 
503 #ifdef CONFIG_NCPFS_NFS_NS
504                 if ((*namespace == NW_NS_NFS) && !(server->m.flags&NCP_MOUNT_NO_NFS)) 
505                 {
506                         result = NW_NS_NFS;
507                         break;
508                 }
509 #endif  /* CONFIG_NCPFS_NFS_NS */
510 #ifdef CONFIG_NCPFS_OS2_NS
511                 if ((*namespace == NW_NS_OS2) && !(server->m.flags&NCP_MOUNT_NO_OS2))
512                 {
513                         result = NW_NS_OS2;
514                 }
515 #endif  /* CONFIG_NCPFS_OS2_NS */
516                 namespace += 1;
517                 no_namespaces -= 1;
518         }
519         ncp_unlock_server(server);
520         return result;
521 #else   /* neither OS2 nor NFS - only DOS */
522         return NW_NS_DOS;
523 #endif  /* defined(CONFIG_NCPFS_OS2_NS) || defined(CONFIG_NCPFS_NFS_NS) */
524 }
525 
526 int
527 ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns)
528 {
529         int ns = ncp_get_known_namespace(server, volume);
530 
531         if (ret_ns)
532                 *ret_ns = ns;
533 
534         DPRINTK("lookup_vol: namespace[%d] = %d\n",
535                 volume, server->name_space[volume]);
536 
537         if (server->name_space[volume] == ns)
538                 return 0;
539         server->name_space[volume] = ns;
540         return 1;
541 }
542 
543 static int
544 ncp_ObtainSpecificDirBase(struct ncp_server *server,
545                 __u8 nsSrc, __u8 nsDst, __u8 vol_num, __le32 dir_base,
546                 const char *path, /* At most 1 component */
547                 __le32 *dirEntNum, __le32 *DosDirNum)
548 {
549         int result;
550 
551         ncp_init_request(server);
552         ncp_add_byte(server, 6); /* subfunction */
553         ncp_add_byte(server, nsSrc);
554         ncp_add_byte(server, nsDst);
555         ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
556         ncp_add_dword(server, RIM_ALL);
557         ncp_add_handle_path(server, vol_num, dir_base, 1, path);
558 
559         if ((result = ncp_request(server, 87)) != 0)
560         {
561                 ncp_unlock_server(server);
562                 return result;
563         }
564 
565         if (dirEntNum)
566                 *dirEntNum = ncp_reply_dword(server, 0x30);
567         if (DosDirNum)
568                 *DosDirNum = ncp_reply_dword(server, 0x34);
569         ncp_unlock_server(server);
570         return 0;
571 }
572 
573 int
574 ncp_mount_subdir(struct ncp_server *server,
575                  __u8 volNumber, __u8 srcNS, __le32 dirEntNum,
576                  __u32* volume, __le32* newDirEnt, __le32* newDosEnt)
577 {
578         int dstNS;
579         int result;
580 
581         ncp_update_known_namespace(server, volNumber, &dstNS);
582         if ((result = ncp_ObtainSpecificDirBase(server, srcNS, dstNS, volNumber, 
583                                       dirEntNum, NULL, newDirEnt, newDosEnt)) != 0)
584         {
585                 return result;
586         }
587         *volume = volNumber;
588         server->m.mounted_vol[1] = 0;
589         server->m.mounted_vol[0] = 'X';
590         return 0;
591 }
592 
593 int 
594 ncp_get_volume_root(struct ncp_server *server,
595                     const char *volname, __u32* volume, __le32* dirent, __le32* dosdirent)
596 {
597         int result;
598 
599         DPRINTK("ncp_get_volume_root: looking up vol %s\n", volname);
600 
601         ncp_init_request(server);
602         ncp_add_byte(server, 22);       /* Subfunction: Generate dir handle */
603         ncp_add_byte(server, 0);        /* DOS namespace */
604         ncp_add_byte(server, 0);        /* reserved */
605         ncp_add_byte(server, 0);        /* reserved */
606         ncp_add_byte(server, 0);        /* reserved */
607 
608         ncp_add_byte(server, 0);        /* faked volume number */
609         ncp_add_dword(server, 0);       /* faked dir_base */
610         ncp_add_byte(server, 0xff);     /* Don't have a dir_base */
611         ncp_add_byte(server, 1);        /* 1 path component */
612         ncp_add_pstring(server, volname);
613 
614         if ((result = ncp_request(server, 87)) != 0) {
615                 ncp_unlock_server(server);
616                 return result;
617         }
618         *dirent = *dosdirent = ncp_reply_dword(server, 4);
619         *volume = ncp_reply_byte(server, 8);
620         ncp_unlock_server(server);
621         return 0;
622 }
623 
624 int
625 ncp_lookup_volume(struct ncp_server *server,
626                   const char *volname, struct nw_info_struct *target)
627 {
628         int result;
629 
630         memset(target, 0, sizeof(*target));
631         result = ncp_get_volume_root(server, volname,
632                         &target->volNumber, &target->dirEntNum, &target->DosDirNum);
633         if (result) {
634                 return result;
635         }
636         ncp_update_known_namespace(server, target->volNumber, NULL);
637         target->nameLen = strlen(volname);
638         memcpy(target->entryName, volname, target->nameLen+1);
639         target->attributes = aDIR;
640         /* set dates to Jan 1, 1986  00:00 */
641         target->creationTime = target->modifyTime = cpu_to_le16(0x0000);
642         target->creationDate = target->modifyDate = target->lastAccessDate = cpu_to_le16(0x0C21);
643         target->nfs.mode = 0;
644         return 0;
645 }
646 
647 int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *server,
648                                             struct inode *dir,
649                                             const char *path,
650                                             __le32 info_mask,
651                                             const struct nw_modify_dos_info *info)
652 {
653         __u8  volnum = NCP_FINFO(dir)->volNumber;
654         __le32 dirent = NCP_FINFO(dir)->dirEntNum;
655         int result;
656 
657         ncp_init_request(server);
658         ncp_add_byte(server, 7);        /* subfunction */
659         ncp_add_byte(server, server->name_space[volnum]);
660         ncp_add_byte(server, 0);        /* reserved */
661         ncp_add_word(server, cpu_to_le16(0x8006));      /* search attribs: all */
662 
663         ncp_add_dword(server, info_mask);
664         ncp_add_mem(server, info, sizeof(*info));
665         ncp_add_handle_path(server, volnum, dirent, 1, path);
666 
667         result = ncp_request(server, 87);
668         ncp_unlock_server(server);
669         return result;
670 }
671 
672 int ncp_modify_file_or_subdir_dos_info(struct ncp_server *server,
673                                        struct inode *dir,
674                                        __le32 info_mask,
675                                        const struct nw_modify_dos_info *info)
676 {
677         return ncp_modify_file_or_subdir_dos_info_path(server, dir, NULL,
678                 info_mask, info);
679 }
680 
681 #ifdef CONFIG_NCPFS_NFS_NS
682 int ncp_modify_nfs_info(struct ncp_server *server, __u8 volnum, __le32 dirent,
683                                __u32 mode, __u32 rdev)
684 
685 {
686         int result = 0;
687 
688         ncp_init_request(server);
689         if (server->name_space[volnum] == NW_NS_NFS) {
690                 ncp_add_byte(server, 25);       /* subfunction */
691                 ncp_add_byte(server, server->name_space[volnum]);
692                 ncp_add_byte(server, NW_NS_NFS);
693                 ncp_add_byte(server, volnum);
694                 ncp_add_dword(server, dirent);
695                 /* we must always operate on both nlinks and rdev, otherwise
696                    rdev is not set */
697                 ncp_add_dword_lh(server, NSIBM_NFS_MODE | NSIBM_NFS_NLINKS | NSIBM_NFS_RDEV);
698                 ncp_add_dword_lh(server, mode);
699                 ncp_add_dword_lh(server, 1);    /* nlinks */
700                 ncp_add_dword_lh(server, rdev);
701                 result = ncp_request(server, 87);
702         }
703         ncp_unlock_server(server);
704         return result;
705 }
706 #endif
707 
708 
709 static int
710 ncp_DeleteNSEntry(struct ncp_server *server,
711                   __u8 have_dir_base, __u8 volnum, __le32 dirent,
712                   const char* name, __u8 ns, __le16 attr)
713 {
714         int result;
715 
716         ncp_init_request(server);
717         ncp_add_byte(server, 8);        /* subfunction */
718         ncp_add_byte(server, ns);
719         ncp_add_byte(server, 0);        /* reserved */
720         ncp_add_word(server, attr);     /* search attribs: all */
721         ncp_add_handle_path(server, volnum, dirent, have_dir_base, name);
722 
723         result = ncp_request(server, 87);
724         ncp_unlock_server(server);
725         return result;
726 }
727 
728 int
729 ncp_del_file_or_subdir2(struct ncp_server *server,
730                         struct dentry *dentry)
731 {
732         struct inode *inode = dentry->d_inode;
733         __u8  volnum;
734         __le32 dirent;
735 
736         if (!inode) {
737                 return 0xFF;    /* Any error */
738         }
739         volnum = NCP_FINFO(inode)->volNumber;
740         dirent = NCP_FINFO(inode)->DosDirNum;
741         return ncp_DeleteNSEntry(server, 1, volnum, dirent, NULL, NW_NS_DOS, cpu_to_le16(0x8006));
742 }
743 
744 int
745 ncp_del_file_or_subdir(struct ncp_server *server,
746                        struct inode *dir, const char *name)
747 {
748         __u8  volnum = NCP_FINFO(dir)->volNumber;
749         __le32 dirent = NCP_FINFO(dir)->dirEntNum;
750         int name_space;
751 
752         name_space = server->name_space[volnum];
753 #ifdef CONFIG_NCPFS_NFS_NS
754         if (name_space == NW_NS_NFS)
755         {
756                 int result;
757  
758                 result=ncp_obtain_DOS_dir_base(server, name_space, volnum, dirent, name, &dirent);
759                 if (result) return result;
760                 name = NULL;
761                 name_space = NW_NS_DOS;
762         }
763 #endif  /* CONFIG_NCPFS_NFS_NS */
764         return ncp_DeleteNSEntry(server, 1, volnum, dirent, name, name_space, cpu_to_le16(0x8006));
765 }
766 
767 static inline void ConvertToNWfromDWORD(__u16 v0, __u16 v1, __u8 ret[6])
768 {
769         __le16 *dest = (__le16 *) ret;
770         dest[1] = cpu_to_le16(v0);
771         dest[2] = cpu_to_le16(v1);
772         dest[0] = cpu_to_le16(v0 + 1);
773         return;
774 }
775 
776 /* If both dir and name are NULL, then in target there's already a
777    looked-up entry that wants to be opened. */
778 int ncp_open_create_file_or_subdir(struct ncp_server *server,
779                                    struct inode *dir, const char *name,
780                                    int open_create_mode,
781                                    __le32 create_attributes,
782                                    __le16 desired_acc_rights,
783                                    struct ncp_entry_info *target)
784 {
785         __le16 search_attribs = cpu_to_le16(0x0006);
786         __u8  volnum;
787         __le32 dirent;
788         int result;
789 
790         volnum = NCP_FINFO(dir)->volNumber;
791         dirent = NCP_FINFO(dir)->dirEntNum;
792 
793         if ((create_attributes & aDIR) != 0) {
794                 search_attribs |= cpu_to_le16(0x8000);
795         }
796         ncp_init_request(server);
797         ncp_add_byte(server, 1);        /* subfunction */
798         ncp_add_byte(server, server->name_space[volnum]);
799         ncp_add_byte(server, open_create_mode);
800         ncp_add_word(server, search_attribs);
801         ncp_add_dword(server, RIM_ALL);
802         ncp_add_dword(server, create_attributes);
803         /* The desired acc rights seem to be the inherited rights mask
804            for directories */
805         ncp_add_word(server, desired_acc_rights);
806         ncp_add_handle_path(server, volnum, dirent, 1, name);
807 
808         if ((result = ncp_request(server, 87)) != 0)
809                 goto out;
810         if (!(create_attributes & aDIR))
811                 target->opened = 1;
812 
813         /* in target there's a new finfo to fill */
814         ncp_extract_file_info(ncp_reply_data(server, 6), &(target->i));
815         target->volume = target->i.volNumber;
816         ConvertToNWfromDWORD(ncp_reply_le16(server, 0),
817                              ncp_reply_le16(server, 2),
818                              target->file_handle);
819         
820         ncp_unlock_server(server);
821 
822         (void)ncp_obtain_nfs_info(server, &(target->i));
823         return 0;
824 
825 out:
826         ncp_unlock_server(server);
827         return result;
828 }
829 
830 int
831 ncp_initialize_search(struct ncp_server *server, struct inode *dir,
832                         struct nw_search_sequence *target)
833 {
834         __u8  volnum = NCP_FINFO(dir)->volNumber;
835         __le32 dirent = NCP_FINFO(dir)->dirEntNum;
836         int result;
837 
838         ncp_init_request(server);
839         ncp_add_byte(server, 2);        /* subfunction */
840         ncp_add_byte(server, server->name_space[volnum]);
841         ncp_add_byte(server, 0);        /* reserved */
842         ncp_add_handle_path(server, volnum, dirent, 1, NULL);
843 
844         result = ncp_request(server, 87);
845         if (result)
846                 goto out;
847         memcpy(target, ncp_reply_data(server, 0), sizeof(*target));
848 
849 out:
850         ncp_unlock_server(server);
851         return result;
852 }
853 
854 int ncp_search_for_fileset(struct ncp_server *server,
855                            struct nw_search_sequence *seq,
856                            int* more,
857                            int* cnt,
858                            char* buffer,
859                            size_t bufsize,
860                            char** rbuf,
861                            size_t* rsize)
862 {
863         int result;
864 
865         ncp_init_request(server);
866         ncp_add_byte(server, 20);
867         ncp_add_byte(server, server->name_space[seq->volNumber]);
868         ncp_add_byte(server, 0);                /* datastream */
869         ncp_add_word(server, cpu_to_le16(0x8006));
870         ncp_add_dword(server, RIM_ALL);
871         ncp_add_word(server, cpu_to_le16(32767));       /* max returned items */
872         ncp_add_mem(server, seq, 9);
873 #ifdef CONFIG_NCPFS_NFS_NS
874         if (server->name_space[seq->volNumber] == NW_NS_NFS) {
875                 ncp_add_byte(server, 0);        /* 0 byte pattern */
876         } else 
877 #endif
878         {
879                 ncp_add_byte(server, 2);        /* 2 byte pattern */
880                 ncp_add_byte(server, 0xff);     /* following is a wildcard */
881                 ncp_add_byte(server, '*');
882         }
883         result = ncp_request2(server, 87, buffer, bufsize);
884         if (result) {
885                 ncp_unlock_server(server);
886                 return result;
887         }
888         if (server->ncp_reply_size < 12) {
889                 ncp_unlock_server(server);
890                 return 0xFF;
891         }
892         *rsize = server->ncp_reply_size - 12;
893         ncp_unlock_server(server);
894         buffer = buffer + sizeof(struct ncp_reply_header);
895         *rbuf = buffer + 12;
896         *cnt = WVAL_LH(buffer + 10);
897         *more = BVAL(buffer + 9);
898         memcpy(seq, buffer, 9);
899         return 0;
900 }
901 
902 static int
903 ncp_RenameNSEntry(struct ncp_server *server,
904                   struct inode *old_dir, const char *old_name, __le16 old_type,
905                   struct inode *new_dir, const char *new_name)
906 {
907         int result = -EINVAL;
908 
909         if ((old_dir == NULL) || (old_name == NULL) ||
910             (new_dir == NULL) || (new_name == NULL))
911                 goto out;
912 
913         ncp_init_request(server);
914         ncp_add_byte(server, 4);        /* subfunction */
915         ncp_add_byte(server, server->name_space[NCP_FINFO(old_dir)->volNumber]);
916         ncp_add_byte(server, 1);        /* rename flag */
917         ncp_add_word(server, old_type); /* search attributes */
918 
919         /* source Handle Path */
920         ncp_add_byte(server, NCP_FINFO(old_dir)->volNumber);
921         ncp_add_dword(server, NCP_FINFO(old_dir)->dirEntNum);
922         ncp_add_byte(server, 1);
923         ncp_add_byte(server, 1);        /* 1 source component */
924 
925         /* dest Handle Path */
926         ncp_add_byte(server, NCP_FINFO(new_dir)->volNumber);
927         ncp_add_dword(server, NCP_FINFO(new_dir)->dirEntNum);
928         ncp_add_byte(server, 1);
929         ncp_add_byte(server, 1);        /* 1 destination component */
930 
931         /* source path string */
932         ncp_add_pstring(server, old_name);
933         /* dest path string */
934         ncp_add_pstring(server, new_name);
935 
936         result = ncp_request(server, 87);
937         ncp_unlock_server(server);
938 out:
939         return result;
940 }
941 
942 int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
943                                 struct inode *old_dir, const char *old_name,
944                                 struct inode *new_dir, const char *new_name)
945 {
946         int result;
947         __le16 old_type = cpu_to_le16(0x06);
948 
949 /* If somebody can do it atomic, call me... vandrove@vc.cvut.cz */
950         result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
951                                            new_dir, new_name);
952         if (result == 0xFF)     /* File Not Found, try directory */
953         {
954                 old_type = cpu_to_le16(0x16);
955                 result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
956                                                    new_dir, new_name);
957         }
958         if (result != 0x92) return result;      /* All except NO_FILES_RENAMED */
959         result = ncp_del_file_or_subdir(server, new_dir, new_name);
960         if (result != 0) return -EACCES;
961         result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
962                                            new_dir, new_name);
963         return result;
964 }
965         
966 
967 /* We have to transfer to/from user space */
968 int
969 ncp_read_kernel(struct ncp_server *server, const char *file_id,
970              __u32 offset, __u16 to_read, char *target, int *bytes_read)
971 {
972         const char *source;
973         int result;
974 
975         ncp_init_request(server);
976         ncp_add_byte(server, 0);
977         ncp_add_mem(server, file_id, 6);
978         ncp_add_be32(server, offset);
979         ncp_add_be16(server, to_read);
980 
981         if ((result = ncp_request(server, 72)) != 0) {
982                 goto out;
983         }
984         *bytes_read = ncp_reply_be16(server, 0);
985         source = ncp_reply_data(server, 2 + (offset & 1));
986 
987         memcpy(target, source, *bytes_read);
988 out:
989         ncp_unlock_server(server);
990         return result;
991 }
992 
993 /* There is a problem... egrep and some other silly tools do:
994         x = mmap(NULL, MAP_PRIVATE, PROT_READ|PROT_WRITE, <ncpfs fd>, 32768);
995         read(<ncpfs fd>, x, 32768);
996    Now copying read result by copy_to_user causes pagefault. This pagefault
997    could not be handled because of server was locked due to read. So we have
998    to use temporary buffer. So ncp_unlock_server must be done before
999    copy_to_user (and for write, copy_from_user must be done before 
1000    ncp_init_request... same applies for send raw packet ioctl). Because of
1001    file is normally read in bigger chunks, caller provides kmalloced 
1002    (vmalloced) chunk of memory with size >= to_read...
1003  */
1004 int
1005 ncp_read_bounce(struct ncp_server *server, const char *file_id,
1006          __u32 offset, __u16 to_read, char __user *target, int *bytes_read,
1007          void* bounce, __u32 bufsize)
1008 {
1009         int result;
1010 
1011         ncp_init_request(server);
1012         ncp_add_byte(server, 0);
1013         ncp_add_mem(server, file_id, 6);
1014         ncp_add_be32(server, offset);
1015         ncp_add_be16(server, to_read);
1016         result = ncp_request2(server, 72, bounce, bufsize);
1017         ncp_unlock_server(server);
1018         if (!result) {
1019                 int len = get_unaligned_be16((char *)bounce +
1020                           sizeof(struct ncp_reply_header));
1021                 result = -EIO;
1022                 if (len <= to_read) {
1023                         char* source;
1024 
1025                         source = (char*)bounce + 
1026                                  sizeof(struct ncp_reply_header) + 2 + 
1027                                  (offset & 1);
1028                         *bytes_read = len;
1029                         result = 0;
1030                         if (copy_to_user(target, source, len))
1031                                 result = -EFAULT;
1032                 }
1033         }
1034         return result;
1035 }
1036 
1037 int
1038 ncp_write_kernel(struct ncp_server *server, const char *file_id,
1039                  __u32 offset, __u16 to_write,
1040                  const char *source, int *bytes_written)
1041 {
1042         int result;
1043 
1044         ncp_init_request(server);
1045         ncp_add_byte(server, 0);
1046         ncp_add_mem(server, file_id, 6);
1047         ncp_add_be32(server, offset);
1048         ncp_add_be16(server, to_write);
1049         ncp_add_mem(server, source, to_write);
1050         
1051         if ((result = ncp_request(server, 73)) == 0)
1052                 *bytes_written = to_write;
1053         ncp_unlock_server(server);
1054         return result;
1055 }
1056 
1057 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
1058 int
1059 ncp_LogPhysicalRecord(struct ncp_server *server, const char *file_id,
1060           __u8 locktype, __u32 offset, __u32 length, __u16 timeout)
1061 {
1062         int result;
1063 
1064         ncp_init_request(server);
1065         ncp_add_byte(server, locktype);
1066         ncp_add_mem(server, file_id, 6);
1067         ncp_add_be32(server, offset);
1068         ncp_add_be32(server, length);
1069         ncp_add_be16(server, timeout);
1070 
1071         if ((result = ncp_request(server, 0x1A)) != 0)
1072         {
1073                 ncp_unlock_server(server);
1074                 return result;
1075         }
1076         ncp_unlock_server(server);
1077         return 0;
1078 }
1079 
1080 int
1081 ncp_ClearPhysicalRecord(struct ncp_server *server, const char *file_id,
1082           __u32 offset, __u32 length)
1083 {
1084         int result;
1085 
1086         ncp_init_request(server);
1087         ncp_add_byte(server, 0);        /* who knows... lanalyzer says that */
1088         ncp_add_mem(server, file_id, 6);
1089         ncp_add_be32(server, offset);
1090         ncp_add_be32(server, length);
1091 
1092         if ((result = ncp_request(server, 0x1E)) != 0)
1093         {
1094                 ncp_unlock_server(server);
1095                 return result;
1096         }
1097         ncp_unlock_server(server);
1098         return 0;
1099 }
1100 #endif  /* CONFIG_NCPFS_IOCTL_LOCKING */
1101 
1102 #ifdef CONFIG_NCPFS_NLS
1103 /* This are the NLS conversion routines with inspirations and code parts
1104  * from the vfat file system and hints from Petr Vandrovec.
1105  */
1106 
1107 int
1108 ncp__io2vol(struct ncp_server *server, unsigned char *vname, unsigned int *vlen,
1109                 const unsigned char *iname, unsigned int ilen, int cc)
1110 {
1111         struct nls_table *in = server->nls_io;
1112         struct nls_table *out = server->nls_vol;
1113         unsigned char *vname_start;
1114         unsigned char *vname_end;
1115         const unsigned char *iname_end;
1116 
1117         iname_end = iname + ilen;
1118         vname_start = vname;
1119         vname_end = vname + *vlen - 1;
1120 
1121         while (iname < iname_end) {
1122                 int chl;
1123                 wchar_t ec;
1124 
1125                 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
1126                         int k;
1127                         unicode_t u;
1128 
1129                         k = utf8_to_utf32(iname, iname_end - iname, &u);
1130                         if (k < 0 || u > MAX_WCHAR_T)
1131                                 return -EINVAL;
1132                         iname += k;
1133                         ec = u;
1134                 } else {
1135                         if (*iname == NCP_ESC) {
1136                                 int k;
1137 
1138                                 if (iname_end - iname < 5)
1139                                         goto nospec;
1140 
1141                                 ec = 0;
1142                                 for (k = 1; k < 5; k++) {
1143                                         unsigned char nc;
1144 
1145                                         nc = iname[k] - '';
1146                                         if (nc >= 10) {
1147                                                 nc -= 'A' - '' - 10;
1148                                                 if ((nc < 10) || (nc > 15)) {
1149                                                         goto nospec;
1150                                                 }
1151                                         }
1152                                         ec = (ec << 4) | nc;
1153                                 }
1154                                 iname += 5;
1155                         } else {
1156 nospec:;                        
1157                                 if ( (chl = in->char2uni(iname, iname_end - iname, &ec)) < 0)
1158                                         return chl;
1159                                 iname += chl;
1160                         }
1161                 }
1162 
1163                 /* unitoupper should be here! */
1164 
1165                 chl = out->uni2char(ec, vname, vname_end - vname);
1166                 if (chl < 0)
1167                         return chl;
1168 
1169                 /* this is wrong... */
1170                 if (cc) {
1171                         int chi;
1172 
1173                         for (chi = 0; chi < chl; chi++){
1174                                 vname[chi] = ncp_toupper(out, vname[chi]);
1175                         }
1176                 }
1177                 vname += chl;
1178         }
1179 
1180         *vname = 0;
1181         *vlen = vname - vname_start;
1182         return 0;
1183 }
1184 
1185 int
1186 ncp__vol2io(struct ncp_server *server, unsigned char *iname, unsigned int *ilen,
1187                 const unsigned char *vname, unsigned int vlen, int cc)
1188 {
1189         struct nls_table *in = server->nls_vol;
1190         struct nls_table *out = server->nls_io;
1191         const unsigned char *vname_end;
1192         unsigned char *iname_start;
1193         unsigned char *iname_end;
1194         unsigned char *vname_cc;
1195         int err;
1196 
1197         vname_cc = NULL;
1198 
1199         if (cc) {
1200                 int i;
1201 
1202                 /* this is wrong! */
1203                 vname_cc = kmalloc(vlen, GFP_KERNEL);
1204                 if (!vname_cc)
1205                         return -ENOMEM;
1206                 for (i = 0; i < vlen; i++)
1207                         vname_cc[i] = ncp_tolower(in, vname[i]);
1208                 vname = vname_cc;
1209         }
1210 
1211         iname_start = iname;
1212         iname_end = iname + *ilen - 1;
1213         vname_end = vname + vlen;
1214 
1215         while (vname < vname_end) {
1216                 wchar_t ec;
1217                 int chl;
1218 
1219                 if ( (chl = in->char2uni(vname, vname_end - vname, &ec)) < 0) {
1220                         err = chl;
1221                         goto quit;
1222                 }
1223                 vname += chl;
1224 
1225                 /* unitolower should be here! */
1226 
1227                 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
1228                         int k;
1229 
1230                         k = utf32_to_utf8(ec, iname, iname_end - iname);
1231                         if (k < 0) {
1232                                 err = -ENAMETOOLONG;
1233                                 goto quit;
1234                         }
1235                         iname += k;
1236                 } else {
1237                         if ( (chl = out->uni2char(ec, iname, iname_end - iname)) >= 0) {
1238                                 iname += chl;
1239                         } else {
1240                                 int k;
1241 
1242                                 if (iname_end - iname < 5) {
1243                                         err = -ENAMETOOLONG;
1244                                         goto quit;
1245                                 }
1246                                 *iname = NCP_ESC;
1247                                 for (k = 4; k > 0; k--) {
1248                                         unsigned char v;
1249                                         
1250                                         v = (ec & 0xF) + '';
1251                                         if (v > '9') {
1252                                                 v += 'A' - '9' - 1;
1253                                         }
1254                                         iname[k] = v;
1255                                         ec >>= 4;
1256                                 }
1257                                 iname += 5;
1258                         }
1259                 }
1260         }
1261 
1262         *iname = 0;
1263         *ilen = iname - iname_start;
1264         err = 0;
1265 quit:;
1266         if (cc)
1267                 kfree(vname_cc);
1268         return err;
1269 }
1270 
1271 #else
1272 
1273 int
1274 ncp__io2vol(unsigned char *vname, unsigned int *vlen,
1275                 const unsigned char *iname, unsigned int ilen, int cc)
1276 {
1277         int i;
1278 
1279         if (*vlen <= ilen)
1280                 return -ENAMETOOLONG;
1281 
1282         if (cc)
1283                 for (i = 0; i < ilen; i++) {
1284                         *vname = toupper(*iname);
1285                         vname++;
1286                         iname++;
1287                 }
1288         else {
1289                 memmove(vname, iname, ilen);
1290                 vname += ilen;
1291         }
1292 
1293         *vlen = ilen;
1294         *vname = 0;
1295         return 0;
1296 }
1297 
1298 int
1299 ncp__vol2io(unsigned char *iname, unsigned int *ilen,
1300                 const unsigned char *vname, unsigned int vlen, int cc)
1301 {
1302         int i;
1303 
1304         if (*ilen <= vlen)
1305                 return -ENAMETOOLONG;
1306 
1307         if (cc)
1308                 for (i = 0; i < vlen; i++) {
1309                         *iname = tolower(*vname);
1310                         iname++;
1311                         vname++;
1312                 }
1313         else {
1314                 memmove(iname, vname, vlen);
1315                 iname += vlen;
1316         }
1317 
1318         *ilen = vlen;
1319         *iname = 0;
1320         return 0;
1321 }
1322 
1323 #endif
1324 

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